NGC 1755

{{Short description|Open cluster in the constellation Dorado}}

{{Infobox open cluster

| name = NGC 1755

| image = 250px

| caption = NGC 1755 (Hubble)

| credit =

| epoch = J2000

| constellation = Dorado

| ra = {{RA|04|55|16.390}}{{cite simbad|title=NGC 1755|access-date=13 February 2021}}

| dec = {{DEC|-68|12|23.12}}

| dist_ly = 160,000{{cite web|url=http://cseligman.com/text/atlas/ngc17a.htm#1755|title=NGC 1755 (= an OCL in the LMC)|publisher=cseligman|access-date=28 July 2015}} ly

| dist_pc = 49,000 pc

| absmag_v = 9.9

| size_v = 2.6′

| age = 80{{cite journal|title=Multiple stellar populations in Magellanic Cloud clusters. IV. The double main sequence of the young cluster NGC 1755|journal=Monthly Notices of the Royal Astronomical Society|volume=458|issue=4|pages=4368|bibcode=2016MNRAS.458.4368M|last1=Milone|first1=A. P.|last2=Marino|first2=A. F.|last3=d'Antona|first3=F.|last4=Bedin|first4=L. R.|last5=Da Costa|first5=G. S.|last6=Jerjen|first6=H.|last7=MacKey|first7=A. D.|year=2016|arxiv=1603.03493|doi=10.1093/mnras/stw608|doi-access=free }} Myr

| names = ESO 56-SC28

}}

NGC 1755 (also known as ESO 56-SC28){{cite web|url=http://dso-browser.com/deep-sky/2678/ngc-1755/open-cluster|title=Open cluster NGC 1755|publisher=dso-browser|access-date=28 July 2016}} is an open star cluster in the Large Magellanic Cloud in the Dorado constellation. It is about 120 light years across and due to its size could be a globular cluster. It has a diameter of 2.6′ and an apparent magnitude of 9.9. It was discovered by James Dunlop in 1826.